Net primary (photosynthetic) productivity (NPP) is:
A) the carbon fixed by the leaves of the plant and not secondary photosynthesizing organs.
B) the amount of biomass that goes into the harvested part of the plant.
C) carbon fixed plus the amount given off through respiration.
D) carbon fixed minus the amount given off through respiration.
Question 2
When returned to the soil after harvest, plant parts such as corn stalks and grape and apple leaves provide ________ material but very little N, P, K for subsequent crops.
A) inorganic B) soluble C) organic D) nutrient-rich
(b) during dry periods they lose their leaves and blossoms.
Primary Motor Cortex and Seizures
Primary Active Transport
Functional Groups of Carbon
Leaves of sugar maples (Acer saccharum)